EP1044538A1 - Procede et dispositif pour verifier la fonction de blocage d'un dispositif de blocage de transmission de constituants de reseau - Google Patents

Procede et dispositif pour verifier la fonction de blocage d'un dispositif de blocage de transmission de constituants de reseau

Info

Publication number
EP1044538A1
EP1044538A1 EP99947201A EP99947201A EP1044538A1 EP 1044538 A1 EP1044538 A1 EP 1044538A1 EP 99947201 A EP99947201 A EP 99947201A EP 99947201 A EP99947201 A EP 99947201A EP 1044538 A1 EP1044538 A1 EP 1044538A1
Authority
EP
European Patent Office
Prior art keywords
transmission
network component
potential
transmission line
node
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99947201A
Other languages
German (de)
English (en)
Other versions
EP1044538B1 (fr
Inventor
Wolfgang Peveling
Simone Schumacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1044538A1 publication Critical patent/EP1044538A1/fr
Application granted granted Critical
Publication of EP1044538B1 publication Critical patent/EP1044538B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215—Controller Area Network CAN

Definitions

  • the present invention relates to a method and a device for checking the blocking function of a network component transmission blocking device, by means of which a transmission line from the network component to the network can be blocked by a blocking function, which causes a logic signal to be applied to a first node.
  • the present invention and the problem on which it is based relate to a network component transmission blocking device of a network located on board a motor vehicle, namely the CAN transmission blocking function (CANSTOP) of the real-time serial bus system “Controller Area Network "(CAN) explained.
  • CANSTOP CAN transmission blocking function
  • network components control devices, sensor devices, actuator devices connected via a bus, such as the CAN bus, are provided with unique addresses, which can be used to specifically exchange messages with a unique assignment between them.
  • a network component is a distance control device that is used in a motor vehicle for automatic distance control.
  • the problem underlying the present invention is generally that it is necessary in certain cases to decouple such a network component from the network or to block its transmission function to the network by a security device in the form of a network component transmission blocking device.
  • Fig. 2 shows a known such transmission blocking device for a CAN network component.
  • 100 denotes a vehicle CAN bus, 10 a controller of a distance control device, 20 a transmission lock signal generating device, 15 a CAN control part of the controller 10 (usually a microcontroller), 151 a TX transmission port of the CAN control part 15, 152 an RX reception port of the CAN control part 15, 30 a CAN transmission / reception device, TX a transmission line, RX a reception line, CANH a CAN high-level line, CAN a CAN low-level line, S1 a switch, SS a blocking signal line , Kl a first node, R a resistor and V + a supply potential.
  • the controller 10 sends 15 signal messages via the CAN control part via the unidirectional nale transmission line TX to the CAN transmission / reception device 30, from where it via the vehicle CAN bus 100 to the other network components via the CAN high-level line CANH and the CAN low-level line CANL. It also receives signal messages addressed to it via the unidirectional receive line RX from the CAN transmission / reception device 30.
  • the transmission blocking signal generating device 20 which in the present example is a digital signal processor (DSP)
  • DSP digital signal processor
  • the transmission blocking signal generating device 20 outputs a blocking signal to the switch S1 via the blocking signal line SS, which closes the switch S1 and thus connects the first node Kl on the transmission line TX to the supply potential V +.
  • the transmission line TX is always at a logical "1" or "H ,” level, which means that no data, ie level changes H-> L or L-> H, can be transmitted Controller 10 to the vehicle CAN bus 100 blocked, and thus unwanted or unforeseeable reactions of other network components on the vehicle CAN bus 100, for example in the form of control units, can be prevented.
  • the resistor R which lies between the first node Kl and the transmission port 151 connected to the transmission line TX, protects the TX transmission port 151 from the supply potential V +.
  • the OK case (transmission blocking device works) cannot be distinguished from the case in which the CAN bus connection to the controller 10 is interrupted, for example the transmission line TX and / or the reception line RX and / or the CAN high-level line CANH and / or the CAN low-level line CANL is / are interrupted or the CAN transmission / reception device 30 has a defect.
  • the CAN control part 15 In both cases, the CAN control part 15 generates the same error flags or markers in its internal evaluation registers), if it does not receive an acknowledgment via the reception RX within a certain time in response to an attempt to transmit a signal message via the transmission line TX. In other words, in all of these cases it detects that there is a decoupling from vehicle CAN bus 100.
  • the checking method according to the invention with the features of claim 1 and the corresponding checking device according to claim 5 have the advantage over the known approach that they offer a simple internal checking option of the blocking function without requiring external intervention in the relevant network component itself.
  • the method also works without being connected to the other network components, ie without the bus connection itself.
  • the idea on which the present invention is based is that a feedback loop is laid from the transmission line to the network component which, when the blocking function is activated, enables a distinction to be made between a malfunction of the network component transmission blocking device and an interruption in the CAN bus connection to the controller. In the first case, a predetermined test signal message is returned to the network component, but not in the second case.
  • the potential of the transmission line is tapped at a second node which lies between the first node and the transmission port of the network component connected to the transmission line.
  • the network component is a controller, in particular a microcontroller, with an interrupt function that can be controlled via an interrupt port.
  • the tapped potential is returned to the interrupt port and the blocking function is checked by analyzing whether an interrupt is triggered or not.
  • An interrupt Taking advantage of this means that there is no loss of computing time because the controller hardware reacts with an interrupt signal when there is an edge change.
  • the network component is a controller, in particular a microcontroller, with a queryable input port.
  • the tapped potential is returned to the interrogable input port and the blocking function is checked by analyzing the signal at the interrogated input port. Polling is used here, which means permanent polling of the controller pin. During this time i.a. No other processor computing function takes place, but no interrupt-capable controller port is required, which is not available per se in many applications.
  • the logic signal is applied to the first node by closing a switch located between the first node and a supply potential.
  • FIG. 1 shows a checking device for a known transmission blocking device for a CAN network component as an exemplary embodiment of the present invention
  • Fig. 2 shows the known transmission blocking device for a CAN network component.
  • FIG. 1 shows a checking device for a known transmission blocking device for a CAN network component as an exemplary embodiment of the present invention, the same reference numerals as in FIG. 1 denoting elements that are the same or have the same function.
  • the check signal line CSM is provided for tapping the potential of the transmission line TX at the second node K2, which lies between the first node K1 and the transmission port 151 of the network component 10 connected to the transmission line TX in the form of the controller. It does this at node K2 tapped potential of the transmission line TX to the interrupt port INT.
  • the checking procedure for the illustrated exemplary embodiment proceeds as follows.
  • the transmission blocking signal generating device 20 in the form of the digital signal processor activates the blocking function when checked by the controller 10.
  • the transmission blocking device which is composed of the transmission blocking signal generating device 20, the blocking signal line SS, the switch ⁇ l and the supply potential V +, works as a whole, this activation causes the application of the logic signal H to the first node Kl and thus a blocking of the transmission line TX. However, if a component of the transmission blocking device is defective, there is no blocking.
  • the controller 10 transmits a predetermined test signal message to the network via the transmission line TX, for example a simple signal level transition (H-> L), when the blocking function is activated upon request.
  • the test signal message is expediently designed such that it is plausible and therefore cannot interfere with other network components, in particular control devices, if the blocking function does not work (NOK case).
  • the blocking function is then checked by analyzing the tapped potential fed back to the interrupt port INT when transmitting the predetermined test signal message. If the transmission blocking device works correctly, no data reaches the interrupt port INT of the controller 10, ie no interrupt is triggered. Is. If there is a defect in the transmission blocking device, an interrupt is triggered since the permanent application of the logic signal H at the first node K1 does not occur and consequently the signal level transition (H-> L) mentioned as an example can occur.
  • the checking device according to the invention can be used not only for CAN modules on board a motor vehicle, but for any network with any network components.
  • the potential tap at node K2 can also be located at another point on the transmission line TX, but an arrangement that is very close behind is expedient the TX transmission port 151 or in the CAN control section itself lies before the TX transmission port 151, so that the probability of an interruption that cannot be determined by this method is kept extremely low (ie to the left in FIG. 1) of the node K2.
  • the tapped potential of the transmission line TX does not necessarily have to be returned to an interruptible controller port.
  • any controller port is suitable for this, which can be queried or polled for a level change, preferably using software.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

L'invention concerne un procédé permettant de vérifier la fonction de blocage d'un dispositif de transmission de composantes de réseau, destiné à bloquer une ligne de transmission (TX) depuis les composantes du réseau (10) en direction du réseau, par une fonction de blocage, qui induit l'application d'un signal (H) local à un premier noeud (K1). Ce procédé comprend les étapes suivantes: prélever le potentiel de la ligne de transmission (TX) et renvoyer le potentiel prélevé jusqu'à la composante du réseau (10); activer la fonction de blocage; transmettre au réseau un message de signal de test en cas de fonction de blocage activée par la composante du réseau (10), par l'intermédiaire de la ligne de transmission (TX); et vérification de la fonction de blocage par analyse du potentiel prélevé envoyé dans la composante du réseau (10).
EP99947201A 1998-10-30 1999-07-13 Procede et dispositif pour verifier la fonction de blocage d'un dispositif de blocage de transmission de constituants de reseau Expired - Lifetime EP1044538B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19850065A DE19850065A1 (de) 1998-10-30 1998-10-30 Verfahren und Vorrichtung zur Überprüfung der Sperrfunktion einer Netzwerkkomponenten-Übertragungssperrvorrichtung
DE19850065 1998-10-30
PCT/DE1999/002158 WO2000027078A1 (fr) 1998-10-30 1999-07-13 Procede et dispositif pour verifier la fonction de blocage d'un dispositif de blocage de transmission de constituants de reseau

Publications (2)

Publication Number Publication Date
EP1044538A1 true EP1044538A1 (fr) 2000-10-18
EP1044538B1 EP1044538B1 (fr) 2004-10-06

Family

ID=7886160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99947201A Expired - Lifetime EP1044538B1 (fr) 1998-10-30 1999-07-13 Procede et dispositif pour verifier la fonction de blocage d'un dispositif de blocage de transmission de constituants de reseau

Country Status (6)

Country Link
US (1) US7017083B1 (fr)
EP (1) EP1044538B1 (fr)
JP (1) JP4243025B2 (fr)
DE (2) DE19850065A1 (fr)
ES (1) ES2229768T3 (fr)
WO (1) WO2000027078A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7596724B2 (en) * 2006-03-31 2009-09-29 Intel Corporation Quiescence for retry messages on bidirectional communications interface
DE102011016924A1 (de) 2011-04-13 2012-10-18 Leopold Kostal Gmbh & Co. Kg Sensoranordnung für ein Kraftfahrzeug
CN103010123B (zh) * 2012-12-10 2014-11-26 南昌大学 一种纯电动汽车用整车控制器

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Publication number Priority date Publication date Assignee Title
US4642636A (en) * 1983-11-16 1987-02-10 Westinghouse Electric Corp. Method and apparatus for auto-calibration of signal conditioning electronics
DE3726742C2 (de) 1987-08-07 1999-02-04 Motorola Inc Störüberwachungsschaltung für ein lokales Netzwerk
US4998069A (en) * 1989-03-31 1991-03-05 Tandem Computers Incorporated Loopback tester for testing field replaceable units
US5161162A (en) * 1990-04-12 1992-11-03 Sun Microsystems, Inc. Method and apparatus for system bus testability through loopback
US5748675A (en) * 1992-09-28 1998-05-05 Chrysler Corporation Vehicle communications network with improved current sourcing
US5574848A (en) * 1993-08-24 1996-11-12 National Semiconductor Corporation Can interface selecting one of two distinct fault recovery method after counting a predetermined number of recessive bits or good can frames
US5604735A (en) * 1995-03-15 1997-02-18 Finisar Corporation High speed network switch
DE19611944C2 (de) * 1996-03-26 2003-03-27 Daimler Chrysler Ag Integrierter Schaltkreis zur Kopplung eines mikrokontrollierten Steuergerätes an einen Zweidraht-Bus
BR9815810A (pt) * 1998-04-13 2000-11-28 Adc Telecommunications Inc Sistema de monitoração de desempenho e acesso de teste e método para conexão cruzada de redes de comunicação

Non-Patent Citations (1)

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Title
See references of WO0027078A1 *

Also Published As

Publication number Publication date
DE59910738D1 (de) 2004-11-11
ES2229768T3 (es) 2005-04-16
EP1044538B1 (fr) 2004-10-06
US7017083B1 (en) 2006-03-21
DE19850065A1 (de) 2000-05-04
JP4243025B2 (ja) 2009-03-25
WO2000027078A1 (fr) 2000-05-11
JP2002529963A (ja) 2002-09-10

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